A current of 2.0 A passed for 5 hr. through a molten metal salt deposits 22.2 g of metal (at. mass 177). The valency of the metal in the metal salt is:

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answer is 3.

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Detailed Solution

W=E⋅i⋅t96500or E=W×96500i⋅t =22.2×965002×5×60×60=59.5 Valency = at. mass E=17759.5=3

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